NewElectrical Design Engineer Bastion TechnologiesElectrical Design EngineerLittleton, COExperience performing electronics analysis (Worst Case Analysis, Electrical Parts Stress Analysis, Failure Modes and Effects Critical Analysis). Bastion offers career opportunities with competitive benefits, exciting possibilities for advancement, and an exceptional work environment; the well-being of our employees is a priority, and our flexibility allows our employees a great work life balance.
Software Engineer II VertaforeSoftware Engineer IIDenver, ColoradoYou will work with a fast-paced, skilled team of developers, product owners, data conversion engineers, and quality assurance engineers across a portfolio of data conversion tools, with development responsibility for your assigned projects. Underpinned by unmatched speed and performance power, we are the trusted backbone that’s taking the insurance industry from friction to flow with Distribution Velocity – speed, performance, and trust - to drive growth at scale.
Senior Software Engineer – IMS TM/DB Application Programmer Rocket SoftwareSenior Software Engineer – IMS TM/DB Application ProgrammerDenver, CORemote$120,500–$162,675 / yearWe are seeking an accomplished Senior Software Engineer with deep expertise in IBM IMS™ Transaction Manager (TM) and Database (DB) application programming to drive the evolution of our IMS compatible technologies within our Enterprise modernization platform. + Contribute to the design and development of key components that replicate or extend IMS TM and DB behaviors—including message handling, transaction scheduling, PSB/DBD structures, DL/I call compatibility, and hierarchical database semantics.
Jira Platform & Identity Automation Engineer - (W2pe) Trace3Jira Platform & Identity Automation Engineer - (W2pe)Broomfield, CO$100–$120 / hourJOB SUMMARY: The Jira Platform & Identity Automation Engineer is responsible for designing and implementing automation and structured data models across Jira Service Management and Jira Assets. The role focuses on automating Active Directory (AD) access workflows and building scalable, maintainable systems that translate business processes into reliable, auditable automation.
Systems Engineer ISYS Technologies IncSystems EngineerBoulder, COI2X Technologies considers factors such as (but not limited to) scope and responsibilities of the position, candidate's work experience, education/training, key skills, internal peer equity, as well as, market and business considerations when extending an offer. Whether the focus is on space exploration, national security, cyber security, or cutting-edge engineering applications, I2X is ready to offer you the chance to make a real-world impact in your field and for your country.
Full Stack Software Engineer DomainToolsFull Stack Software EngineerDenver, CORemote$125,000–$165,000DomainTools constantly monitors the Internet and brings together the most comprehensive and trusted domain website and DNS data to provide immediate context and machine-learning driven risk analytics delivered in near real-time. The world’s most advanced security teams use our solutions to identify external risks, investigate threats, and proactively protect their organizations in a constantly evolving threat landscape.
Project Engineer Actalent IncProject EngineerAurora, CO$48–$58 / hourIf you would like to request a reasonable accommodation, such as the modification or adjustment of the job application process or interviewing process due to a disability, please email actalentaccommodation@actalentservices.com for other accommodation options. Responsibilities: Lead the full project lifecycle for conveyor system construction projects, from pre‑bid planning and estimating through execution, change management, invoicing, and closeout.
Structural Engineer (SE - Civil/Truss) Illinois Tool WorksStructural Engineer (SE - Civil/Truss)Any City, CO$75,000–$120,000 / yearIn a high-volume production environment, this position enables scalable, accurate, and efficient design delivery, helping customers operate more productively while reinforcing Alpine's reputation as a trusted industry leader. Why This Role Matters: This Structural Engineer position is critical to Alpine's mission of delivering high-quality, reliable building component solutions that directly impact the safety, efficiency, and profitability of its customers.
Sr Manufacturing Engineer Sierra Space CorporationSr Manufacturing EngineerEnglewood, CO$132,933–$182,781.75 / yearThe Sr Manufacturing Engineer role is a senior-level position responsible for leading strategic initiatives to improve production efficiency and quality, designing and optimizing manufacturing processes, and mentoring junior engineers. Any unsolicited resumes submitted to our website or to Sierra Space team members not through our approved vendor list or Talent Acquisition will be considered property of Sierra Space, and we will not be obligated to pay any referral fees.
Manufacturing Engineer III Sierra Space CorporationManufacturing Engineer IIIEnglewood, CO$109,368–$150,381 / yearThe Manufacturing Engineer III role is responsible for leading process optimization and efficiency improvement initiatives, developing and implementing quality control measures, and collaborating with stakeholders to enhance manufacturing processes. Any unsolicited resumes submitted to our website or to Sierra Space team members not through our approved vendor list or Talent Acquisition will be considered property of Sierra Space, and we will not be obligated to pay any referral fees.
Software Systems Engineer II Sierra Space CorporationSoftware Systems Engineer IILouisville, CO$105,534–$145,109.25 / yearAny unsolicited resumes submitted to our website or to Sierra Space team members not through our approved vendor list or Talent Acquisition will be considered property of Sierra Space, and we will not be obligated to pay any referral fees. Staying current with industry trends and advancements in software development and space technologies will be essential, and you will work both independently and as part of a team to deliver high-quality software solutions.
Structural Analysis Engineer II Sierra Space CorporationStructural Analysis Engineer IILouisville, CO$90,707–$124,744.25 / yearAny unsolicited resumes submitted to our website or to Sierra Space team members not through our approved vendor list or Talent Acquisition will be considered property of Sierra Space, and we will not be obligated to pay any referral fees. In this role, you will perform and contribute to the design and analysis of structural systems, leveraging a strong understanding of structural analysis principles, including hand calculations and Finite Element Analysis.
Sr. Applied AI Software Engineer- Vision Products Group & Siri Apple IncSr. Applied AI Software Engineer- Vision Products Group & SiriBoulder, COYou will also need to apply excellent UX intuition to identify and shape feature opportunities, iterate with design, and define technical requirements that drive development.5+ years in software development Bachelor's degree in a related field or equivalent experience Strong programming skills in any programming language (preferably at least one of Swift, Objective-C, C++) and deep understanding of data structures, memory management, and concurrency Systems thinking, including ability to break down ambiguous problems and drive clarity on critical details Demonstrated ability to translate user experience design into technical requirements Solid cross-functional collaboration and technical communication skillsShipping customer-facing features or products to production at scale Developing for Apple platforms using Apple system frameworks like SwiftUI and ARKit Building & shipping features using LLMs and/or Machine Learning algorithms, including on-device inference, data-driven validation, requirement definition, and collaboration with algorithm teams Processing sensor data (e.g. image/video, audio, motion) and/or developing AR applications Developing & validating personalization features, including working with sensitive data such as conversation transcripts or Health data Developing under strict privacy and security constraints, including techniques like secure data processing, and/or privacy-by-design principles Developing system software or frameworks, including API definition and performance optimization (particularly for resource constrained or real-time systems).
Information Assurance Engineer General Dynamics CorpInformation Assurance EngineerBoulder, CO$118,570–$125,000 / yearBuild and maintain security artifacts like Risk Management Framework (RMF) security plans, testing plans, and System Impact Analyses to ensure compliance, readiness, and legitimate security of government systems. General Dynamics Mission Systems (GDMS) engineers a diverse portfolio of high technology solutions, products and services that enable customers to successfully execute missions across all domains of operation.
Principal System Safety Engineer RTX CorpPrincipal System Safety EngineerAurora, COCollaborate with stakeholders across a range of engineering functions to identify and mitigate risks: Systems Engineering, Software Engineering, Firmware Engineering, Electrical Engineering, Hardware Engineering, Environmental Safety, & Health, Human Systems Interfaces, Test Engineering. This requires advanced application of MIL-STD 882E for System Safety (hardware, software, firmware, and personnel) for DoD Missile systems, typically obtained through advanced education combined with experience as well as project management experience and leadership.
Test Engineer III - Radio Frequency Specialization Sierra Space CorporationTest Engineer III - Radio Frequency SpecializationLouisville, CO$112,694–$154,975.25 / yearWorking effectively in multi-disciplinary design and development teams, you will provide guidance and direction to less experienced engineers while independently determining and developing approaches to testing solutions under general direction. As a Test Engineer III at Sierra Space, you will leverage your extensive experience and general expertise in specific areas of test engineering to lead and contribute to advanced testing and validation of aerospace systems and components.
NewProject Engineer Loenbro IncProject EngineerLoveland, CO$60,000–$80,000 / yearLoenbro is a trusted, long-term construction lifecycle partner to thousands of customers across the U.S. Our market spans all industries, and our service offerings include Critical Electrical, Mechanical & Structural, Soft Crafts, Inspection, Underground Maintenance and Installation, and Fabrication. Join a team where your expertise is valued, your growth is supported, and your work helps maintain and enhance the critical infrastructure that powers communities across the nation.
Navigation Engineer (5-8 yrs) Advanced SpaceNavigation Engineer (5-8 yrs)Westminster, Colorado$115,500–$148,400 / yearYou'll contribute to missions including NASA's CAPSTONE spacecraft operating in a Near Rectilinear Halo Orbit (NRHO) around the Moon and Oracle , AFRL's lunar space situational awareness mission, while helping shape the future of cislunar exploration. As the owner and operator of NASA's CAPSTONE mission and the Prime Contractor for AFRL's Oracle mission, we're helping shape the future of cislunar exploration while supporting commercial, civil, and national security customers.
Senior Information Assurance Engineer General Dynamics CorpSenior Information Assurance EngineerBoulder, CO$149,831–$158,000 / yearBuild and maintain security artifacts like Risk Management Framework (RMF) security plans, testing plans, and System Impact Analyses to ensure compliance, readiness, and legitimate security of government systems. General Dynamics Mission Systems (GDMS) engineers a diverse portfolio of high technology solutions, products and services that enable customers to successfully execute missions across all domains of operation.
Senior Software Engineer, Battlespace Awareness Anduril Industries IncSenior Software Engineer, Battlespace AwarenessBroomfield, CO$190,000–$252,000 / yearC/C++, Python, and Matlab; Big data/NoSQL/database technologies; Software engineering: software design, algorithm implementation, and software analysis, testing, and optimization; Machine learning: supervised and unsupervised learning, clustering, and classification; Applied mathematics: differential equations, linear algebra, optimization, statistics, and random processes; Engineering: controls, estimation theory, and digital signal processing. This third-party service provider provides risk-intelligence services that may include analysis of sanctions and watchlists, adverse media, public-record information, and other lawful open-source or commercial data sources.
Mechanical Engineer II Sierra Space CorporationMechanical Engineer IILouisville, CO$90,707–$124,744.25 / yearThe Mechanical Engineer II role focuses on providing solutions to a variety of technical problems of moderate scope and complexity related to mechanical systems, propulsion, structures, or environmental systems. Any unsolicited resumes submitted to our website or to Sierra Space team members not through our approved vendor list or Talent Acquisition will be considered property of Sierra Space, and we will not be obligated to pay any referral fees.
Mechanical Engineer StandardAero IncMechanical EngineerBroomfield, CO$85,000–$95,000 / yearAs a Mechanical Engineer, you'll provide engineering support to the business unit for all aspects of component repair related to development of minor repairs and continuous improvement programs. Reviews all scrap not able to be dispositioned routinely with a view to applying book repairs, logging scrap rates and costs, and accumulating stock as future-repairable.
Senior Software Engineer, Rust Anduril Industries IncSenior Software Engineer, RustBroomfield, CO$190,000–$252,000 / yearThis third-party service provider provides risk-intelligence services that may include analysis of sanctions and watchlists, adverse media, public-record information, and other lawful open-source or commercial data sources. To ensure your safety and help you navigate your job search with confidence, please keep the following critical points in mind: No Financial Requests: Anduril will never solicit payment or demand personal financial details (such as banking information, credit card numbers, or social security numbers) at any stage of our hiring process.
Sr Embedded Software Engineer Sierra Space CorporationSr Embedded Software EngineerLouisville, CO$156,666–$215,436.75 / yearProviding leadership in design reviews, you will make high-level design decisions that significantly impact program cost, schedule, and technical performance, ensuring successful outcomes for challenging and impactful projects. This role requires strong leadership abilities to guide a team of engineers and the capability to make high-level design decisions that significantly impact program cost, schedule, and technical performance.
Principal Loads & Dynamics Engineer Sierra Space CorporationPrincipal Loads & Dynamics EngineerLouisville, CO$169,294–$232,800.25 / yearCollaborating with cross-functional teams, you will develop and refine system designs, ensuring they meet performance and safety requirements while analyzing and interpreting data from tests and simulations to inform design decisions and identify areas for improvement. Any unsolicited resumes submitted to our website or to Sierra Space team members not through our approved vendor list or Talent Acquisition will be considered property of Sierra Space, and we will not be obligated to pay any referral fees.
Principal Product Owner Systems Engineer RTX CorpPrincipal Product Owner Systems EngineerAurora, COYou will partner closely with Product Managers, Scrum Masters, software engineers, and systems engineers to maintain a healthy backlog that enables continuous delivery of mission-critical capabilities. As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote.
Hardware Engineer - Level 5 Northrop Grumman CorpHardware Engineer - Level 5Boulder, CO$146,300–$241,400 / yearDesigns new or modifies existing products, develops technical specifications for production, analyzes hardware configuration and processing solutions, and tests hardware conformance to specifications. Proven ability to manage tasking and personnel resources to optimize support of multiple concurrent programs, including developing strategic staffing plans for multidisciplinary teams.
Guidance, Navigation & Controls Engineer III (Clearance Required) Sierra Space CorporationGuidance, Navigation & Controls Engineer III (Clearance Required)Louisville, CO$129,776–$178,441.25 / yearYou will perform open-loop and closed-loop stability analyses to ensure robust system design and functionality, while taking ownership of multiple GNC modes for flight phases, including detailed algorithm design and validation processes. The selected candidate will take ownership of critical aspects of GNC systems, including design, Monte Carlo simulations, and hardware-in-the-loop (HITL) testing, while mentoring junior engineers and driving innovation in aerospace technology.
System Design Engineer Summit Integrated SystemsSystem Design EngineerLouisville, CO$63,000–$95,000 / yearWe value providing a rewarding employee atmosphere of working as a team towards shared goals and rewards, and we are looking for individuals who embody our core values of: People First, Driven by Excellence, Be Humble-Stay Humble, Integrity Speaks Louder than Words, Generosity without Limits, Don't Forget to Have Fun. Engineer AVL system designs by validating system design concepts, employing both industry best practices and real-world application insights to ensure solutions are functional, technically sound, reliable, and optimized for long-term performance and scalability.
Test Engineer III Sierra Space CorporationTest Engineer IIILouisville, CO$112,694–$154,975.25 / yearAs a Test Engineer III at Sierra Space, you will leverage your extensive experience and general expertise in specific areas of test engineering to lead and contribute to advanced testing and validation of aerospace systems and components. Work effectively in multi-disciplinary design and development teams, providing guidance and direction to less experienced engineers while independently determining and developing approaches to testing solutions under general direction.
Mid- Level Data Engineer Vantage Data Centers Management Co LLCMid- Level Data EngineerDenver, COThe Technology & Systems department participates in designing each of our new data center building's networking infrastructure, including but not limited to diverse pathways connecting to carriers, meet-me room (MMR) hosting (rack, cabs, ladders, cross connect panels…), wireless AP coverage, etc. Developing and operating across North America, EMEA and Asia Pacific, Vantage has evolved data center design in innovative ways to deliver dramatic gains in reliability, efficiency and sustainability in flexible environments that can scale as quickly as the market demands.
Principal Mechanical Engineer Sierra Space CorporationPrincipal Mechanical EngineerLouisville, CO$167,096–$229,757 / yearBy applying advanced technical principles, theories, and concepts, you will contribute to engineering projects, utilizing data analysis and interpretation skills to evaluate test and simulation data, inform design decisions, and identify areas for improvement. Any unsolicited resumes submitted to our website or to Sierra Space team members not through our approved vendor list or Talent Acquisition will be considered property of Sierra Space, and we will not be obligated to pay any referral fees.
Software Engineer, Rust Anduril Industries IncSoftware Engineer, RustBroomfield, CO$165,000–$218,000 / yearThis third-party service provider provides risk-intelligence services that may include analysis of sanctions and watchlists, adverse media, public-record information, and other lawful open-source or commercial data sources. To ensure your safety and help you navigate your job search with confidence, please keep the following critical points in mind: No Financial Requests: Anduril will never solicit payment or demand personal financial details (such as banking information, credit card numbers, or social security numbers) at any stage of our hiring process.
Navigation Engineer (2-5 yrs) Advanced SpaceNavigation Engineer (2-5 yrs)Westminster, Colorado$92,000–$121,000 / yearYou'll work alongside experienced engineers to improve estimation techniques, develop navigation software, and contribute to real spacecraft missions—including NASA's CAPSTONE mission, AFRL's Oracle mission, and next-generation commercial, civil, and national security programs. We're looking for someone who enjoys solving challenging technical problems, is eager to grow their expertise in spacecraft navigation, and wants to make a direct impact on missions that are flying—not just being imagined.
NewLead BI Engineer LoenbroLead BI EngineerWestminster, ColoradoRemoteLoenbro is a trusted, long-term construction lifecycle partner to thousands of customers across the U.S. Our market spans all industries and our service offerings include Critical Electrical, Mechanical & Structural, Soft Crafts, Inspection, Underground Maintenance and Installation, and Fabrication. Leverage AI and automation tools (e.g., Copilot for Power BI, AI-driven DAX/M optimization, natural language query features) to accelerate report development, surface deeper insights, and reduce manual reporting effort.
NewProject Engineer III (Clearance Required) Sierra Space CorporationProject Engineer III (Clearance Required)Louisville, CO$119,064–$163,713 / yearSpace Vehicle Integration: Plan and execute hardware and software integration activities for spacecraft buses, payloads, and subsystems; coordinate interface control documents (ICDs) and manage technical interfaces across vehicle elements. Driving innovation and continuous improvement within the engineering team will be a key focus, as will serving as the bridge between Engineering and Program offices to resolve conflicts and represent the voice of all stakeholders, including support functions and customers.
Senior Registered Structural Engineer - Power Generation Black & Veatch Holding CoSenior Registered Structural Engineer - Power GenerationGreenwood Village, CO$170,508–$284,736 / yearTypical roles include being recognized as an industry expert, participating in professional societies by presenting papers, acting as a section lead for a large or complex specialty area, an engineering consultant for larger scale projects. You'll work alongside teams solving complex challenges and turning ideas into solutions that perform in the real world-gaining hands-on experience across projects, technologies, and disciplines.
CNC Tooling Sales And Application Engineer KennametalCNC Tooling Sales And Application EngineerDenver, COThis position is responsible for driving metal-cutting tool sales growth with new and established customers, both direct and indirect by managing customer relationship, providing technical direction/support, and increasing productivity for our customers. Actively collaborating with internal sales and support professionals, such as Application Engineers, Channel Partner Reps, Inside Sales, and others to provide value and a positive end-to-end customer experience.
Data Engineer Datavail CorporationData EngineerBoulder, CODatavail is a leading provider of data management, application development, analytics, and cloud services, with more than 1,000 professionals helping clients build and manage applications and data via a world-class tech-enabled delivery platform and software solutions across all leading technologies. For more than 17 years, Datavail has worked with thousands of companies spanning different industries and sizes, and is an AWS Advanced Tier Consulting Partner, a Microsoft Solutions Partner for Data & AI and Digital & App Innovation (Azure), an Oracle Partner, and a MySQL Partner.
Solution Engineer, AI Business Process Microsoft CorpSolution Engineer, AI Business ProcessDenver, CO$106,400–$203,600 / yearYour role involves owning the technical win strategy and supporting AI Business Process Sales Specialists (SSP) by forming strong relationships with C-Suite executives, Business Decision Makers (BDMs), and Technical Decision Makers (TDMs) like CIO, CTO, and IT Leaders. You will secure competitive wins against key competitors by showcasing Microsoft's unique differentiation, One Microsoft narrative, supporting migration and replacement technical plans, and addressing technical blockers related to Copilot and AI Agents compliance, privacy, and security concerns.
CNC Tooling Sales and Application Engineer Kennametal IncCNC Tooling Sales and Application EngineerDenver, COThis position is responsible for driving metal-cutting tool sales growth with new and established customers, both direct and indirect by managing customer relationship, providing technical direction/support, and increasing productivity for our customers. Actively collaborating with internal sales and support professionals, such as Application Engineers, Channel Partner Reps, Inside Sales, and others to provide value and a positive end-to-end customer experience.
ASIC/FPGA Design Engineer IV, TS/SCI Clearance Lockheed Martin CorpASIC/FPGA Design Engineer IV, TS/SCI ClearanceLouisville, CO$123,500–$217,695 / yearJoin Our Team as an ASIC & FPGA Engineer where you will support over 50 different programs and research and development (R&D) efforts, affecting technology across military space, civil space, commercial space, missiles, missile defense platforms, satellite surveillance platforms, deep space exploration, and manned flight missions. • Proactively monitor and manage team member workloads, tracking progress against assigned tasks and labor capacity, while collaborating with project engineers and managers as needed to ensure clear communication regarding the teams execution.
Product Security Engineer - Federal Ping Identity Holding CorpProduct Security Engineer - FederalCO$19–$85 / hourProduct Security Engineers partner closely with engineering teams to review code, identify vulnerabilities, and improve the security posture of production software across Ping's revenue-generating products. Hands-on experience working with Secure Software Development Lifecycle (SSDLC) security tooling, such as source code scanning tools (SAST) and third-party dependency or software composition analysis (SCA).
Component Engineer Senior Lockheed Martin CorporationComponent Engineer SeniorLittleton, CO$85,500–$150,765 / yearFamiliarity with military specifications and engineering requirements, such as Mil-STD-883, Mil-STD-750, Mil-PRF-19500, Mil-PRF-38534, Mil-PRF-38535, Mil-PRF-123, Mil-PRF-55365, Mil-PRF-55342. Your responsibilities will include resolving technical challenges and non-conformances during manufacturing and testing, oversight of LM and Subcontractor EEEE Components, and participating/leading PMP issue resolutions with the Parts, Materials and Process Control Board (PMPCB).
Asic/Fpga Design Engineer IV, Ts/Sci Clearance Lockheed Martin CorporationAsic/Fpga Design Engineer IV, Ts/Sci ClearanceBoulder, CO$123,500–$217,695 / yearDescription:Join Our Team as an ASIC & FPGA Engineer where you will support over 50 different programs and research and development (R&D) efforts, affecting technology across military space, civil space, commercial space, missiles, missile defense platforms, satellite surveillance platforms, deep space exploration, and manned flight missions. Proactively monitor and manage team member workloads, tracking progress against assigned tasks and labor capacity, while collaborating with project engineers and managers as needed to ensure clear communication regarding the teams execution.
Payload Systems Engineer Vitesse SystemsPayload Systems EngineerLongmont, ColoradoThe following position is open: Payload Systems Engineer At Custom Microwave Inc., A Vitesse Company, we design, engineer, and manufacture world class solutions for satellite applications. The definition of a US person is provided under 22 CFR § 120.62 as one who: Who has been granted US citizenship, Who has a lawful permanent resident in the US, Who has been granted the status of “protected person”, Or an employee of the US government.
Senior Mechatronics Engineer OutriderSenior Mechatronics EngineerBrighton, CO$160,000–$180,000 / yearThe ideal candidate will embrace our goal to drive zero-emission, self-driving vehicle adoption, and help us realize our potential to define, build, and lead a new category of robotic automation for the enterprise. Lead reliability initiatives by analyzing failure modes, implementing design and process improvements, and driving corrective actions to improve product performance, durability, and lifecycle cost.
Senior Mechanical Engineer, Test And Reliability OutriderSenior Mechanical Engineer, Test And ReliabilityHenderson, CO$150,000–$180,000 / yearDesign, build, and maintain reliability test fixtures and automated test rigs that simulate real-world operating conditions for accelerated life testing (ALT), fatigue, thermal cycling, and environmental stress screening. The ideal candidate will embrace our goal to drive zero-emission, self-driving vehicle adoption, and help us realize our potential to define, build, and lead a new category of robotic automation for the enterprise.
Principal Cloud Engineer Coalfire Systems IncPrincipal Cloud EngineerCO$109,000–$182,000 / yearFedRAMP's 2026 modernization replaces narrative compliance documentation with measurable security outcomes, validated through automation and evidenced continuously. You'll take on the most strategic and technical implementations our clients require and support the Cloud Services organization on continuous delivery improvements through client engagements.
Energy Efficiency Engineer (Mid-Level) System OneEnergy Efficiency Engineer (Mid-Level)Denver, ColoradoSystem One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. Support targeted end-use technologies such as HVAC (cooling/heating), refrigeration, and compressed air systems .